package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.mapper.DishMapper;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

/**
 * @author: HuangQi
 * @date: Created in 11:54 2023/9/6
 * @description: 菜品业务层实现类
 */
@Service
@Slf4j
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {

    @Autowired
    private DishFlavorService dishFlavorService;

    /**
     * 新增菜品,同时保存对应的口味数据
     *
     * @param dishDto
     */
    @Override
    public void saveWithFlavors(DishDto dishDto) {
        //保存菜品的基本信息
        this.save(dishDto);

        Long dishId = dishDto.getId();

        //保存菜品对应的口味数据
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map(flavor -> {
            flavor.setDishId(dishId);
            return flavor;
        }).collect(Collectors.toList());
        dishFlavorService.saveBatch(flavors);

    }

    /**
     * 根据菜品id查询菜品信息和对应的口味信息
     *
     * @param id
     * @return
     */
    @Override
    public DishDto getByIdWithFlavors(Long id) {
        DishDto dishDto = new DishDto();
        //根据id查询菜品信息
        Dish dish = this.getById(id);
        BeanUtils.copyProperties(dish, dishDto);

        //根据菜品id查询对应的口味信息
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId, id);
        List<DishFlavor> flavors = dishFlavorService.list(queryWrapper);
        dishDto.setFlavors(flavors);

        return dishDto;
    }

    /**
     * 更新菜品信息和对应的口味信息
     *
     * @param dishDto
     */
    @Override
    @Transactional
    public void updateWithFlavors(DishDto dishDto) {
        //更新菜品信息
        this.updateById(dishDto);

        //清理当前菜品对应的口味数据
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId, dishDto.getId());
        dishFlavorService.remove(queryWrapper);

        //添加当前提交过来菜品对应的口味信息
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors.stream().map(flavor -> {
            flavor.setDishId(dishDto.getId());
            return flavor;
        }).collect(Collectors.toList());
        dishFlavorService.saveBatch(flavors);
    }
}
